As is so often the case, Buster Posey delivered in the clutch, per the SF Chronicle's blog post --

The Giants tied the game, and got Bumgarner a no-decision, after
Angel Pagan and Marco Scutaro walked with one out in the eighth.
Gonzalez walked Pagan. Scutaro took a walk from from Drew Storen knowing
his 19-game hit streak might be doomed.Buster Posey then grounded a single through the hole to scoring Pagan and tie the game 1-1.